Trust your voice.
It's difficult to trust your voice, but it's also the most important thing in writing – as well as in personal growth.
One of the most difficult things in writing is trusting your voice.
It takes years of experience to reach that point, if not decades, but if you don't strive for it, you will never feel accomplished as a writer.
In fact, it's the striving for trusting your voice that does the job, since you will never be fully satisfied with it. It's an ongoing process that makes you better every time you write.
The moment you stop caring about what your voice is telling you, though, you lose yourself. In an instant, you are bewildered, and nothing seems to work.